Comment 8 for bug 1927078

Heh, a comment in Jawn's debdiff:

    * User/group names must match [a-z_][a-z0-9_-]*[$]

I found period also worked fine:

root@u20:~# useradd 0.0
root@u20:~# getent passwd 0.0
0.0:x:1001:1001::/home/0.0:/bin/sh
root@u20:~# userdel 0.0
root@u20:~# getent passwd 0.0
root@u20:~# exit

I know comments are almost always out of date by the time I read them, but this one seems wronger than usual. :)